Load Specifications
Bullet Manufacturer:Sellier & Bellot
Bullet Weight:180 gr
Bullet Diameter:0.308"
Bullet Length:<<locked>>
Case Length (l3):2.003"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:74 Grains of Water
Primer Size:Large Rifle (LR)
Barrel Length:24"
Max. allowed Pressure:65,000 psi
Recommended Twist Rate:1:15.0
Load data in caliber .300 Rem. SA Ultra Mag. with .308 | 180gr | Sellier & Bellot SPRN bullet and 103 powders. The key underlying parameters are shown in the table above.
Important Notice: DO NOT go below Minimum Charge or above Maximum Charge. Since we have no control over the equipment and components used, any responsibility and liability for the results achieved is rejected.
Only powders/loads that match the current filter criteria are displayed: max pressure of a load ≤ 90% of max. standardized pressure, fill rate ≥ 80% and propellant combustion ≥ 95%. Use the sliders above the tables to adjust these thresholds.
Charge: Powder weight in grains. Start with the minimum load and work up carefully.
FR (Fill Rate): Case fill as a percentage. Values above 100% mean compressed loads.
MaxP / %: Maximum chamber pressure in bar and as a percentage of the standardized maximum for this caliber.
V(0): Muzzle velocity in feet per second (fps) at the standardized barrel length.
z (Powder Burn): Estimated propellant combustion percentage at bullet exit.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 84% | 58,392 psi | 90% | 2677 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 57,754 psi | 89% | 2710 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 55,434 psi | 85% | 2726 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 56,188 psi | 86% | 2720 fps | 98% |
| Accurate 3100ᴾ | <<locked>> | 100% | 44,570 psi | 69% | 2635 fps | 97.6% |
| Accurate 4064 | <<locked>> | 90% | 57,711 psi | 89% | 2759 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 57,740 psi | 89% | 2851 fps | 100% |
| ADI AR 2206H | <<locked>> | 86% | 57,522 psi | 88% | 2789 fps | 100% |
| ADI AR 2208 | <<locked>> | 92% | 58,392 psi | 90% | 2789 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 51,996 psi | 80% | 2776 fps | 96.4% |
| ADI Benchmark 8208 | <<locked>> | 84% | 56,463 psi | 87% | 2740 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 57,812 psi | 89% | 2707 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 57,595 psi | 89% | 2917 fps | 100% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 51,924 psi | 80% | 2776 fps | 96.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 55,434 psi | 85% | 2766 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 55,709 psi | 86% | 2785 fps | 100% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 58,697 psi | 90% | 2907 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 94% | 56,304 psi | 87% | 2890 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 51,155 psi | 79% | 2769 fps | 96.4% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 42,105 psi | 65% | 2657 fps | 99.7% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 47,471 psi | 73% | 2825 fps | 99.4% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 57,595 psi | 89% | 2812 fps | 100% |
| Bofors RP3 | <<locked>> | 90% | 56,086 psi | 86% | 2782 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 55,898 psi | 86% | 2756 fps | 98.2% |
| Hodgdon Benchmark | <<locked>> | 84% | 57,957 psi | 89% | 2720 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 56,144 psi | 86% | 2772 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 58,218 psi | 90% | 2871 fps | 100% |
| Hodgdon H380 | <<locked>> | 90% | 56,884 psi | 88% | 2795 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 96% | 56,550 psi | 87% | 2851 fps | 98.8% |
| Hodgdon H4350 | <<locked>> | 94% | 57,116 psi | 88% | 2812 fps | 97.8% |
| Hodgdon H4895 | <<locked>> | 86% | 58,117 psi | 89% | 2799 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 54,810 psi | 84% | 2779 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 58,001 psi | 89% | 2835 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 57,101 psi | 88% | 2890 fps | 98.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,723 psi | 55% | 1677 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 55,666 psi | 86% | 2749 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 58,407 psi | 90% | 2776 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 57,943 psi | 89% | 2772 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 88% | 57,856 psi | 89% | 2759 fps | 98.8% |
| IMR 4350 | <<locked>> | 98% | 56,260 psi | 87% | 2782 fps | 98.3% |
| IMR 4451 Enduron | <<locked>> | 94% | 57,769 psi | 89% | 2785 fps | 98.8% |
| IMR 4831ᴾ | <<locked>> | 100% | 58,204 psi | 90% | 2844 fps | 100% |
| IMR 4895 | <<locked>> | 88% | 57,145 psi | 88% | 2812 fps | 100% |
| IMR 8208 XBR | <<locked>> | 84% | 56,463 psi | 87% | 2740 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 57,580 psi | 89% | 2762 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 56,840 psi | 87% | 2717 fps | 100% |
| Lovex S062 | <<locked>> | 90% | 58,088 psi | 89% | 2769 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 57,232 psi | 88% | 2779 fps | 99.5% |
| Lovex S070 | <<locked>> | 98% | 58,436 psi | 90% | 2818 fps | 99.1% |
| Norma 201 | <<locked>> | 86% | 56,086 psi | 86% | 2733 fps | 100% |
| Norma 202 | <<locked>> | 86% | 56,710 psi | 87% | 2730 fps | 100% |
| Norma 203B | <<locked>> | 90% | 58,653 psi | 90% | 2822 fps | 100% |
| Norma 204 | <<locked>> | 98% | 57,029 psi | 88% | 2835 fps | 97.3% |
| Norma MRPᴾ | <<locked>> | 100% | 47,297 psi | 73% | 2785 fps | 97.2% |
| Norma URP | <<locked>> | 98% | 56,565 psi | 87% | 2841 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 88% | 55,637 psi | 86% | 2799 fps | 100% |
| Ramshot Hunter | <<locked>> | 98% | 55,201 psi | 85% | 2838 fps | 99.2% |
| Ramshot TAC | <<locked>> | 84% | 56,507 psi | 87% | 2762 fps | 99.6% |
| Ramshot Wild Boar | <<locked>> | 84% | 56,333 psi | 87% | 2776 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 82% | 57,246 psi | 88% | 2743 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,492 psi | 56% | 1719 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 56,927 psi | 88% | 2779 fps | 99.1% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 56,405 psi | 87% | 2851 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 55,999 psi | 86% | 2884 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 57,406 psi | 88% | 2874 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 56,710 psi | 87% | 2907 fps | 99.9% |
| Rottweil R 901 | <<locked>> | 84% | 57,246 psi | 88% | 2713 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 56,826 psi | 87% | 2733 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 55,956 psi | 86% | 2772 fps | 100% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 49,893 psi | 77% | 2749 fps | 96.4% |
| Rottweil R 907 | <<locked>> | 94% | 55,898 psi | 86% | 2756 fps | 98.2% |
| Shooters World Long Rifle | <<locked>> | 96% | 57,232 psi | 88% | 2779 fps | 99.5% |
| Shooters World Match Rifle | <<locked>> | 86% | 57,580 psi | 89% | 2762 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 58,088 psi | 89% | 2769 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 58,436 psi | 90% | 2818 fps | 99.1% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 57,725 psi | 89% | 2835 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 55,317 psi | 85% | 2746 fps | 99.7% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 55,825 psi | 86% | 2762 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 57,537 psi | 89% | 2667 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 57,856 psi | 89% | 2667 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 57,421 psi | 88% | 2733 fps | 98.8% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 49,414 psi | 76% | 2746 fps | 96.2% |
| Somchem S321 | <<locked>> | 82% | 57,711 psi | 89% | 2769 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 56,811 psi | 87% | 2664 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 58,711 psi | 90% | 2785 fps | 100% |
| Somchem S355 | <<locked>> | 92% | 56,144 psi | 86% | 2769 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 54,665 psi | 84% | 2838 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 50,560 psi | 78% | 2730 fps | 97.3% |
| Vihtavuori N130 | <<locked>> | 82% | 57,261 psi | 88% | 2628 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 57,841 psi | 89% | 2651 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 56,811 psi | 87% | 2694 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 57,522 psi | 88% | 2713 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 57,551 psi | 89% | 2746 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 55,419 psi | 85% | 2785 fps | 99.9% |
| Vihtavuori N530 | <<locked>> | 84% | 56,797 psi | 87% | 2736 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 55,405 psi | 85% | 2710 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 57,899 psi | 89% | 2838 fps | 99.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 46,876 psi | 72% | 2733 fps | 99.6% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 55,361 psi | 85% | 2759 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 57,174 psi | 88% | 2785 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 56,855 psi | 87% | 2854 fps | 98.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 37,855 psi | 58% | 2680 fps | 99.9% |
| Winchester StaBALL Match | <<locked>> | 86% | 55,956 psi | 86% | 2772 fps | 100% |
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 51,547 psi | 79% | 2592 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 44,483 psi | 68% | 2526 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 51,837 psi | 80% | 2677 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 43,178 psi | 66% | 2503 fps | 95.2% |
| Accurate 3100 | <<locked>> | 94% | 36,332 psi | 56% | 2474 fps | 95.2% |
| Accurate 4064 | <<locked>> | 80% | 42,076 psi | 65% | 2526 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 31,154 psi | 48% | 2365 fps | 95.2% |
| ADI AR 2206H | <<locked>> | 80% | 47,703 psi | 73% | 2641 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 80% | 40,451 psi | 62% | 2493 fps | 98.6% |
| ADI AR 2209 | <<locked>> | 98% | 48,892 psi | 75% | 2723 fps | 95.7% |
| ADI Benchmark 8208 | <<locked>> | 80% | 49,806 psi | 77% | 2641 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 50,763 psi | 78% | 2618 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 43,584 psi | 67% | 2680 fps | 99.2% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 48,559 psi | 75% | 2720 fps | 95.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 40,480 psi | 62% | 2520 fps | 99.6% |
| Alliant Reloder-15 | <<locked>> | 80% | 43,366 psi | 67% | 2582 fps | 99.2% |
| Alliant Reloder-16 | <<locked>> | 80% | 31,401 psi | 48% | 2379 fps | 95.3% |
| Alliant Reloder-17 | <<locked>> | 80% | 34,969 psi | 54% | 2500 fps | 98.4% |
| Alliant Reloder-19 | <<locked>> | 98% | 47,877 psi | 74% | 2713 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 86% | 27,296 psi | 42% | 2290 fps | 95% |
| Alliant Reloder-26 | <<locked>> | 90% | 33,475 psi | 51% | 2520 fps | 95.4% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 47,137 psi | 73% | 2651 fps | 99.3% |
| Bofors RP3 | <<locked>> | 80% | 40,205 psi | 62% | 2526 fps | 99.6% |
| Bofors RP7 | <<locked>> | 86% | 43,526 psi | 67% | 2549 fps | 95.6% |
| Hodgdon Benchmark | <<locked>> | 80% | 51,242 psi | 79% | 2625 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 48,936 psi | 75% | 2667 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 80% | 54,418 psi | 84% | 2818 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 41,031 psi | 63% | 2533 fps | 97.8% |
| Hodgdon H414 | <<locked>> | 86% | 40,756 psi | 63% | 2579 fps | 95.6% |
| Hodgdon H4350 | <<locked>> | 86% | 44,324 psi | 68% | 2598 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 48,182 psi | 74% | 2648 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 28,921 psi | 44% | 2283 fps | 96.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 44,324 psi | 68% | 2628 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 88% | 43,134 psi | 66% | 2651 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,760 psi | 41% | 1499 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 46,064 psi | 71% | 2598 fps | 99.9% |
| IMR 3031 | <<locked>> | 80% | 48,124 psi | 74% | 2635 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 42,511 psi | 65% | 2526 fps | 99.1% |
| IMR 4166 Enduron | <<locked>> | 80% | 45,063 psi | 69% | 2552 fps | 96.6% |
| IMR 4350 | <<locked>> | 90% | 43,918 psi | 68% | 2579 fps | 95.8% |
| IMR 4451 Enduron | <<locked>> | 82% | 39,929 psi | 61% | 2477 fps | 95% |
| IMR 4831 | <<locked>> | 82% | 32,343 psi | 50% | 2379 fps | 95.8% |
| IMR 4895 | <<locked>> | 80% | 44,425 psi | 68% | 2608 fps | 99.6% |
| IMR 8208 XBR | <<locked>> | 80% | 49,806 psi | 77% | 2641 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 47,253 psi | 73% | 2618 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 47,268 psi | 73% | 2572 fps | 99.8% |
| Lovex S062 | <<locked>> | 80% | 42,525 psi | 65% | 2530 fps | 99.9% |
| Lovex S065 | <<locked>> | 80% | 35,056 psi | 54% | 2379 fps | 95.1% |
| Lovex S070 | <<locked>> | 86% | 40,118 psi | 62% | 2510 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 46,688 psi | 72% | 2589 fps | 100% |
| Norma 202 | <<locked>> | 80% | 47,137 psi | 73% | 2595 fps | 100% |
| Norma 203B | <<locked>> | 80% | 42,714 psi | 66% | 2569 fps | 99.4% |
| Norma 204 | <<locked>> | 92% | 46,644 psi | 72% | 2667 fps | 95% |
| Norma MRP | <<locked>> | 96% | 41,307 psi | 64% | 2664 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 31,546 psi | 49% | 2369 fps | 95.2% |
| Ramshot Big Game | <<locked>> | 80% | 42,366 psi | 65% | 2585 fps | 99.3% |
| Ramshot Hunter | <<locked>> | 86% | 37,217 psi | 57% | 2510 fps | 95.3% |
| Ramshot TAC | <<locked>> | 80% | 49,734 psi | 77% | 2657 fps | 98.8% |
| Ramshot Wild Boar | <<locked>> | 80% | 49,443 psi | 76% | 2674 fps | 99.9% |
| Ramshot X-Terminator | <<locked>> | 80% | 53,490 psi | 82% | 2690 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,122 psi | 42% | 1535 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 41,307 psi | 64% | 2513 fps | 96.3% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 46,021 psi | 71% | 2687 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 37,246 psi | 57% | 2559 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 33,112 psi | 51% | 2438 fps | 95.6% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 35,288 psi | 54% | 2497 fps | 95.6% |
| Rottweil R 901 | <<locked>> | 80% | 50,734 psi | 78% | 2621 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 44,454 psi | 68% | 2546 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 80% | 38,000 psi | 58% | 2474 fps | 99.1% |
| Rottweil R 905 | <<locked>> | 98% | 46,731 psi | 72% | 2694 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 86% | 43,526 psi | 67% | 2549 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 35,056 psi | 54% | 2379 fps | 95.1% |
| Shooters World Match Rifle | <<locked>> | 80% | 47,253 psi | 73% | 2618 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 42,525 psi | 65% | 2530 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 86% | 40,118 psi | 62% | 2510 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 38,827 psi | 60% | 2520 fps | 98.7% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 48,196 psi | 74% | 2635 fps | 99% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 46,151 psi | 71% | 2612 fps | 99.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 47,877 psi | 74% | 2536 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 40,045 psi | 62% | 2411 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 39,059 psi | 60% | 2428 fps | 95% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 46,296 psi | 71% | 2690 fps | 95.4% |
| Somchem S321 | <<locked>> | 80% | 54,114 psi | 83% | 2720 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 47,500 psi | 73% | 2536 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 47,964 psi | 74% | 2628 fps | 99.8% |
| Somchem S355 | <<locked>> | 80% | 38,595 psi | 59% | 2474 fps | 99.1% |
| Somchem S365 | <<locked>> | 80% | 28,181 psi | 43% | 2323 fps | 97.4% |
| Somchem S385 | <<locked>> | 94% | 41,626 psi | 64% | 2572 fps | 95.1% |
| Vihtavuori N130 | <<locked>> | 80% | 53,882 psi | 83% | 2585 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 48,269 psi | 74% | 2526 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 44,222 psi | 68% | 2520 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 44,773 psi | 69% | 2533 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 36,854 psi | 57% | 2415 fps | 99.5% |
| Vihtavuori N160 | <<locked>> | 80% | 32,793 psi | 50% | 2372 fps | 95.7% |
| Vihtavuori N530 | <<locked>> | 80% | 49,893 psi | 77% | 2638 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 43,091 psi | 66% | 2523 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 32,372 psi | 50% | 2372 fps | 95.2% |
| Vihtavuori N555 | <<locked>> | 86% | 29,559 psi | 45% | 2369 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 32,532 psi | 50% | 2349 fps | 97.8% |
| Winchester 748 | <<locked>> | 80% | 49,966 psi | 77% | 2687 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 40,973 psi | 63% | 2582 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 90% | 27,412 psi | 42% | 2365 fps | 95.6% |
| Winchester StaBALL Match | <<locked>> | 80% | 45,832 psi | 71% | 2618 fps | 99.9% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 103 powders for .300 Rem. SA Ultra Mag. loaded with the .308 | 180gr | Sellier & Bellot SPRN. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,917 fps; across all powders the maximum-charge window runs from 1,677 fps to 2,917 fps. Accurate 3100 gives the best case fill at 100 %, and 103 of the 103 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (448 MPa), the top charges use 55–90 %, leaving at least 10 % headroom. The 180.0 gr projectile in 0.308" calls for a 1:15.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2209, Alliant Power Pro Varmint reach 100 % fill or more at maximum charge, so these are compressed loads: they need a long drop tube to seat cleanly and react sensitively to the case capacity of your own brass lot. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.